Once the box is moving how do you make it change direction?

Answer 1

So this question is touching on Newton's first law of motion which states that an object in motion will stay in motion unless acted on by an outside force. This also applies to objects not moving: an object at rest will stay at rest etc.

What does this mean? If you have an apple sitting on a table, it will never spontaneously fly across the room. For the apple to move someone or something must push it. This "push," which changes an object's speed or direction is called a force. You must apply a force to the apple to move it across the table.

An astronaut moving through deep space will move at a constant speed until she turns on a jetpack or rocketship engine. And to stop and then go back the way she came, she must use the jetpack to apply a Force in the direction she wants to go.

You can apply these ideas to humans, planets, boxes, pretty much anything. So with Newton's first law in mind, how could the box in the question change direction?

I hope that helps! Let me know if you have any other questions.